WorksheetsVolcano Review
Total questions: 14
Worksheet time: 14mins
Where do most volcanoes occur? Why?
Most volcanoes are found at plate boundaries. This is where magma forms.
Most volcanoes are in Kansas because there are a lot of mountains there
Volcanoes aren't real
What is needed for magma to form?
Freezing temperatures and no water
High temperatures, Low Pressure, Water
A really big dog
If a volcano is dormant, can it become active? Can it become extinct?
It can only go extinct
It cant become anything
A dormant volcano can become active or extinct.
How is magma composition related to viscosity?
It isn't
The higher the silica the higher the viscosity.
All magma is the same
What is the role of water in an explosive eruption?
Hot magma beneath the surface mixes with water, pressure grows, then volcano erupts.
Water puts out the lava
Water has no effect on types of eruption
How do volcanic gases affect the atmosphere?
They don't
They are good for the atmosphere
Volcanic gases can be poisonous which is bad for humans
Why do felsic magmas erupt explosively?
it traps the gas until the pressure builds up so much the rock explodes.
It doesn't thats mafic Lava
All lava is explosive
Why do mafic lavas flow rather than explode?
Mafic lava does explode
Mafic flows are low in silica and so they do not trap gas.
Because its not real lava
Why do effusive eruptions sometimes cause a lot of damage?
They are explosive
They are easy to evacuate from
They dont cause any damage
Why do mafic lavas produce shield-shaped volcanoes?
They dont
Because they can
it is fluid so it spreads more than Felsic
Why do felsic lavas produce cone-shaped volcanoes?
It is thicker so it doesn't travel as much
They dont
All volcanos are the same
How did composite and shield volcanoes earn their names?
They just picked a name
Composite are made of two materials. Shield volcanoes have the shape of a shield.
We didn't learn this
What features would you use to identify each of the three volcano types?
Color
Smell
Size, shape, composition
Why is it important that volcanic eruptions can form new land?
Because its cooler that way
This is the only way new landforms.
It isn't important at all
